scholarly journals Assessment of Recycling-derived Fertilizers as an Alternative to Mineral Fertilizers – Effects on the Soil Microbiome

2020 ◽  
Vol 2 (7A) ◽  
Author(s):  
Lea Deinert ◽  
Israel Ikoyi ◽  
Achim Schmalenberger
Keyword(s):  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Soil Microbiome ◽  
Most Probable Number ◽  
Mineral Fertilizers ◽  
Probable Number ◽  
Soil P ◽  
Pot Trial ◽  
Living Organisms ◽  
The Impact

Phosphorus (P) is an essential macronutrient for all living organisms and is applied as fertilizer in agroecosystems to improve crop growth. Recycling-derived fertilizers (RDFs) have been developed for nutrient recovery from Europe’s largest waste streams as a sustainable alternative to this finite resource. The impact of four RDFs (two ashes, two struvites) on the soil microbiome in comparison with a P-free control and triple super phosphate (TSP) as mineral fertilizer was investigated in a pot trial and a subsequent microcosm trial (subset of samples). For both experiments perennial ryegrass was cultivated for 54 days. The pot trial was conducted at P fertilization rates of 20 and 60 kg P ha-1 in quadruplicates. After the pot harvest the bulk soil was stored until the microcosm trial was conducted, using the control, TSP and the two ashes at 60 kg P ha-1 in six replicates. Pot trial results showed highest P bioavailability from struvites at high P rates, also resulting in higher biomass yield on average. Furthermore, P solubilization capabilities from tri-calcium phosphate was enhanced in the RDFs treatments, while the TSP treatments were negatively affected. For the microcosm trial, most probable number (MPN) analysis showed that phytate-utilizing bacterial abundance was significantly increased in one of the ashes and had also remained higher in the RDF treatments after storage. Understanding the effects of recycling-derived fertilizer application on the soil P cycle is vital for developing a more sustainable agriculture.

Soil conditions and yield of repeatedly grown apple orchard depending on long-term fertilizer application

2021 ◽  
Vol 1 (98) ◽  
pp. 34-47
Author(s):  
P. H. Kopytko ◽  
◽  
R. V. Yakovenko
Keyword(s):  
Soil Fertility ◽  
Organic Fertilizer ◽  
Humus Content ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Mineral Fertilizers ◽  
Soil Conditions ◽  
Apple Trees ◽  
The Impact

The issue of scientifically sound fertilizer application in fruit plantations, which are long-term and re-grown in one place remains insufficiently studied. To solve this problem is possible only in long-term stationary studies, as the impact of different fertilizer systems on changes in soil properties and tree productivity for a long period of their use. The results of researches of long-term fertilizer influence on the main fertility indices of dark gray podzolic heavy loam soil and productivity of repeatedly grown apple trees of Idared varieties on seed and vegetative (M4) rootstocks and Calville snow on seedling rootstock are considered. During the 85-year period of growing the first and second generation of apple trees in the experimental garden, the organic fertilizer (40 t/ha of cattle manure), mineral fertilizer (N120P120K120) and their combination (20 t/ha of manure + N60P60K60) were applied in the old plantation every two years in autumn in plowing in rows at 18–20 cm, and in the new repetition: manure, phosphorus and potassium fertilizers as well, and nitrogen fertilizer in half doses annually in spring for cultivation or disk plowing to a depth of 12–15 cm. As a result of research it was found that organic fertilizer better than mineral fertilizers provided the formation of soil fertility (humus and mobile compounds and forms of nutrients, soil reaction) and yield capacity of experimental apple trees, which for all years of fruiting exceeded the total yield of Calville snow and Idared on seedling and vegetative rootstocks, respectively, by 34.8, 27.7 and 23.4 % compared with the yield of the control non-fertilized areas and 16.0, 15.8 and 13.2 % – on those fertilized with N120Р120К120. Similar parameters of soil fertility indicators are formed by the organo-mineral fertilizer system with systematic long-term application of half the norms of organic and mineral fertilizers of manure 20 t/ha together with N60P60K60. However, the mineral system (N120P120K120) significantly less increases the humus content and content of macronutrients available for plant nutrition and does not enrich the soil with trace elements, acidifies the reaction of the soil environment

EFFECTIVENESS OF DIFFERENTIATION OF FERTILIZERS DOSES IN GRAIN FALLOW CROP ROTATION LINK

1970 ◽  
pp. 20-24
Author(s):  
А. I. Ivanov ◽  
Zh. А. Ivanova ◽  
N. А. Tsyganova
Keyword(s):  
Crop Rotation ◽  
Soil Cover ◽  
Arable Land ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Perennial Grasses ◽  
Low Fertility ◽  
Mineral Fertilizers ◽  
The Impact ◽  
Fertilizer Rates

To assess the efficiency of spatial differentiation of the organic and mineral fertilizer rates in the grain-fallow rotation link the landscape field trial was established in 2013 at the Menkovo experimental station of the Agrophysical Research Institute. The object of study was a historically formed plot of arable land on a mild glacial origin slope of northwestern and western expositions with total area - 53.64 ha (including 47.3 ha of plowed field and 6.34 ha of hayland). The structure of the soil cover consists of a combination of small-contour complexes of light and medium-loamy varieties of soddy gleyed podzolic and gleyic soils. Parent rock is mainly represented by thin and medium loamy and clay sandy moraine underlying by glacial sandy loam on a depth of 75 – 120cm. Soils of medium fertility with plots of high and low fertility are dominated on plowed field. Five key plots of agromicrolandscape (AML) with different geochemical regimes have been selected. The impact of zonal and precision organo-mineral fertilizer system was studied in the "complete fallow – winter wheat – oats plus perennial grasses" crop rotation. Significant differentiation of the soil cover properties of arable land on a mild slope depending on the landscape and environmental conditions was established. The transition to precision agrochemical survey is relevant. The crop rotation link productivity within the five facies of the agricultural landscape varied from 4.98 to 8.68 t/ha in the variant without fertilizer application and from 7.59 to 14.6 t/ha in the variant with fertilizer application. The sufficiency of 1 kg NPK in the fertilizer application variant varied from 1.7 to 5.6 grain units. Sufficient grounds have not been revealed to explain this variability of the indicators only with the relief location and geochemical regime. The optimization of fertilizer rates with regard to specific geochemical regimes (an increase of 12% in AML and a decrease of 14% in AML due to the redistribution of organic and mineral fertilizers) provided increase the sufficiency of 1 kg NPK by 35 %. The methodological basis of such optimization induces a need to develop more detailed scientific argumentation.  

scholarly journals Microbiocenosis characteristics of agrogenically altered acid brown forest soils in humid subtropics of Russia

2021 ◽  
Vol 34 ◽  
pp. 05002
Author(s):  
Elena Rogozhina ◽  
Lyudmila Malyukova
Keyword(s):  
Forest Soils ◽  
Functional Activity ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Climatic Conditions ◽  
The Black Sea ◽  
Mineral Fertilizers ◽  
Nitrogen Fixation Activity ◽  
The Impact ◽  
Brown Forest Soils

Under conditions of perennial cropping of industrial tea crop on acidic brown forest soils of the Black Sea coast of Russia, the following were investigated: number of bacteria, of actinomycetes (mainly the Streptomyces genus) and of micromycetes (saccharomycetes), seasonal dynamics and functional activity of the microbial complex during period of 2008-2019. Stationary experiments were launched in various backgrounds of mineral fertilizer application. The experiment was accompanied by the use of generally accepted recommended techniques for microbiological studies. As follows from the analysis of the data obtained, it was established that the long treatment period of mineral fertilizers at doses from N200P60K50 to N600P180K150 in given soil-climatic conditions under the tea crop contributed to significant decrease in the number of actinomycetes and nitrogen fixing bacteria of the Beijerinckia genus vs. the control variant (without fertilizers). The most significant decrease in the number of micromycetes was revealed immediately after the application of mineral fertilizers at a dose of N600P180K150. After 2 months, the number of this group of soil microorganisms was built back. Under the impact of both medium and high doses of mineral fertilizers, the functional activity decrease of soils (CO2 emission and potential nitrogen fixation activity) was noted.

Change of the redox potential in the profile of light grey forest surface-gleyed soil under different anthropogenic

2018 ◽  
Vol 2 (95) ◽  
pp. 26-29
Author(s):  
O.S. Gavrishko ◽  
Yu.M. Olifir ◽  
T.V. Partyka
Keyword(s):  
Redox Potential ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Soil Tillage ◽  
Mineral Fertilizers ◽  
Gleyed Soil ◽  
Agricultural Use ◽  
Fertilizer System ◽  
And Control ◽  
The Given

The results of studies of the change in redox potential in the profile of light gray forest surface-gleyed soil on variants with long-term agricultural use without applying fertilizers and mineral fertilizer system solely compared with the soil under the forest are presented. On the basis of the conducted analyzes it was established, that soil tillage without fertilizer application and with mineral fertilizer solely has a different effect on ROP in the profile. In the soil without fertilization (control) as compared to the forest a moderate oxidizing (514 mV) and slightly oxidizing (437 mV) processes are happening. Prolonged application of mineral fertilizers to the soil (N65R68K68) significantly reduced the redox potential of all genetic horizons compared with forest and control without fertilizers. For the given fertilizer system the highest values of ROP were obtained in arable HEgl and underarable HEgl layers: 426 mV and 416 mV respectively. Redox potential sharply decreases with the depth to 398-311 mV, which characterizes processes occurring in the soil profile, as weakly reducing and close to moderately reducing.

scholarly journals The Influence of Mineral Fertilizer Combined With a Nitrification Inhibitor on Microbial Populations and Activities in Calcareous Uzbekistanian Soil Under Cotton Cultivation

2001 ◽  
Vol 1 ◽  
pp. 108-113 ◽  
Author(s):  
Dilfuza Egamberdiyeva ◽  
Muhiddin Mamiev ◽  
Svetlana K. Poberejskaya
Keyword(s):  
Nitrification Inhibitor ◽  
Mineral Fertilizer ◽  
Denitrifying Bacteria ◽  
Nitrifying Bacteria ◽  
Most Probable Number ◽  
Nitrification Rate ◽  
Nitrification Inhibitors ◽  
Probable Number ◽  
Soil Microbial ◽  
Soil Microbial Population

Application of fertilizers combined with nitrification inhibitors affects soil microbial biomass and activity. The objective of this research was to determine the effects of fertilizer application combined with the nitrification inhibitor potassium oxalate (PO) on soil microbial population and activities in nitrogen-poor soil under cotton cultivation in Uzbekistan. Fertilizer treatments were N as urea, P as ammophos, and K as potassium chloride. The nitrification inhibitor PO was added to urea and ammophos at the rate of 2%. Three treatments—N200P140K60(T1), N200P140 POK60(T2), and N200P140 POK60(T3) mg kg-1soil—were applied for this study. The control (C) was without fertilizer and PO. The populations of oligotrophic bacteria, ammonifying bacteria, nitrifying bacteria, denitrifying bacteria, mineral assimilating bacteria, oligonitrophilic bacteria, and bacteria group Azotobacter were determined by the most probable number method. The treatments T2 and T3 increased the number of oligonitrophilic bacteria and utilization mineral forms of nitrogen on the background of reducing number of ammonifying bacteria. T2 and T3 also decreased the number of nitrifying bacteria, denitrifying bacteria, and net nitrification. In conclusion, our experiments showed that PO combined with mineral fertilizer is one of the most promising compounds for inhibiting nitrification rate, which was reflected in the increased availability and efficiency of fertilizer nitrogen to the cotton plants. PO combined with mineral fertilizer has no negative effects on nitrogen-fixing bacteria Azotobacter and oligo-nitrophilic bacteria.

scholarly journals The Mineral Fertilizer-Dependent Chemical Parameters of Soil Acidification under Field Conditions

2020 ◽  
Vol 12 (17) ◽  
pp. 7165
Author(s):  
Przemysław Tkaczyk ◽  
Agnieszka Mocek-Płóciniak ◽  
Monika Skowrońska ◽  
Wiesław Bednarek ◽  
Sebastian Kuśmierz ◽  
...  
Keyword(s):  
Soil Acidification ◽  
Soil Acidity ◽  
Management Practices ◽  
Base Cations ◽  
Mineral Fertilizer ◽  
High Rate ◽  
Mineral Fertilizers ◽  
Chemical Parameters ◽  
Npk Fertilizer ◽  
The Impact

Soil acidification in agroecosystems is a natural process that could be accelerated, mainly by the inappropriate application of mineral fertilizers, or prevented, by sustainable management practices. On the basis of a three-year field study in a grassland agroecosystem, the impact of different rates of fertilization with nitrogen (N), phosphorus (P), and potassium (K) on soil chemical parameters related to soil acidity was evaluated. It was found that high-rate fertilization with ammonium nitrate accelerated the soil acidification process, which was additionally intensified by the application of superphosphate and potassium salt. The sum of exchangeable base cations, the values of base saturation and hydrolytic acidity in the soil reflected the interactions between the applied NPK-fertilizer levels. Considering chemical parameters related to soil acidity studied in this experiment, it seems that the best strategies for mitigating soil acidification in grasslands are reducing nitrate leaching, changing fertilizer types and increasing the input of base cations.

scholarly journals Quantifying N2O emissions from intensive grassland production: the role of synthetic fertilizer type, application rate, timing and nitrification inhibitors

2016 ◽  
Vol 154 (5) ◽  
pp. 812-827 ◽  
Author(s):  
M. J. BELL ◽  
J. M. CLOY ◽  
C. F. E. TOPP ◽  
B. C. BALL ◽  
A. BAGNALL ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Fertilizer Application ◽  
Application Rate ◽  
Nitrous Oxide Emissions ◽  
Mineral Fertilizers ◽  
Urea Fertilizer ◽  
Mitigation Options ◽  
Application Rates ◽  
The Impact ◽  
Ipcc Default

SUMMARYIncreasing recognition of the extent to which nitrous oxide (N2O) contributes to climate change has resulted in greater demand to improve quantification of N2O emissions, identify emission sources and suggest mitigation options. Agriculture is by far the largest source and grasslands, occupying c. 0·22 of European agricultural land, are a major land-use within this sector. The application of mineral fertilizers to optimize pasture yields is a major source of N2O and with increasing pressure to increase agricultural productivity, options to quantify and reduce emissions whilst maintaining sufficient grassland for a given intensity of production are required. Identification of the source and extent of emissions will help to improve reporting in national inventories, with the most common approach using the IPCC emission factor (EF) default, where 0·01 of added nitrogen fertilizer is assumed to be emitted directly as N2O. The current experiment aimed to establish the suitability of applying this EF to fertilized Scottish grasslands and to identify variation in the EF depending on the application rate of ammonium nitrate (AN). Mitigation options to reduce N2O emissions were also investigated, including the use of urea fertilizer in place of AN, addition of a nitrification inhibitor dicyandiamide (DCD) and application of AN in smaller, more frequent doses. Nitrous oxide emissions were measured from a cut grassland in south-west Scotland from March 2011 to March 2012. Grass yield was also measured to establish the impact of mitigation options on grass production, along with soil and environmental variables to improve understanding of the controls on N2O emissions. A monotonic increase in annual cumulative N2O emissions was observed with increasing AN application rate. Emission factors ranging from 1·06–1·34% were measured for AN application rates between 80 and 320 kg N/ha, with a mean of 1·19%. A lack of any significant difference between these EFs indicates that use of a uniform EF is suitable over these application rates. The mean EF of 1·19% exceeds the IPCC default 1%, suggesting that use of the default value may underestimate emissions of AN-fertilizer-induced N2O loss from Scottish grasslands. The increase in emissions beyond an application rate of 320 kg N/ha produced an EF of 1·74%, significantly different to that from lower application rates and much greater than the 1% default. An EF of 0·89% for urea fertilizer and 0·59% for urea with DCD suggests that N2O quantification using the IPCC default EF will overestimate emissions for grasslands where these fertilizers are applied. Large rainfall shortly after fertilizer application appears to be the main trigger for N2O emissions, thus applicability of the 1% EF could vary and depend on the weather conditions at the time of fertilizer application.

scholarly journals The Impact of Water Intrusion on Pathogenic Vibrio Species to Inland Brackish Waters of China

2020 ◽  
Vol 17 (18) ◽  
pp. 6781
Author(s):  
Qingyao Wang ◽  
Songzhe Fu ◽  
Qian Yang ◽  
Jingwei Hao ◽  
Can Zhou ◽  
...  
Keyword(s):  
Seawater Intrusion ◽  
Water Area ◽  
Vibrio Species ◽  
Most Probable Number ◽  
Potential Health ◽  
Probable Number ◽  
Inland River ◽  
Pathogenic Vibrio ◽  
The Impact ◽  
Vibrio Spp

The estuary is the ecological niche of pathogenic Vibrio spp. as it provides abundant organic and inorganic nutrients from seawater and rivers. However, little is known about the ecology of these Vibrio species in the inland brackish water area. In this study, their co-occurrence and relationships to key environmental constraints (salinity and temperature) in the Hun-Tai River of China were examined using the most probable number polymerase chain reaction (MPN-PCR) approach. We hereby report 2-year continuous surveillance based on six water indices of the Hun-Tai River. The results showed that seawater intrusion maximally reached inland as far as 26.5 km for the Hun-Tai River. Pathogenic Vibrio spp. were detected in 21.9% of the water samples. In particular, V. cholerae, V. parahaemolyticus, and V. vulnificus were isolated in 10 (10.4%), 20 (20.8.5%), and 2 (2.08%) samples, respectively. All V. parahaemolyticus strains were tdh gene negative, 10% were positive for the trh gene. Multi-locus sequence typing (MLST) divided V. parahaemolyticus strains into 12 sequence types (STs) for the Hun-Tai River. Five STs were respectively present in various locations along the Hun-Tai River. The PCR assay for detecting six virulence genes and Vibrio seventh pandemic island I and II revealed three genotypes in 12 V. cholerae isolates. The results of our study showed that seawater intrusion and salinity have profound effects on the distribution of pathogenic Vibrio spp. in the inland river, suggesting a potential health risk associated with the waters of the Hun-Tai River used for irrigation and drinking.

High Salinity Relay as a Postharvest Processing Strategy To Reduce Vibrio vulnificus Levels in Chesapeake Bay Oysters (Crassostrea virginica)†

2011 ◽  
Vol 74 (11) ◽  
pp. 1902-1907 ◽  
Author(s):  
CORINNE AUDEMARD ◽  
HOWARD I. KATOR ◽  
MARTHA W. RHODES ◽  
THOMAS GALLIVAN ◽  
A. J. ERSKINE ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
High Salinity ◽  
Vibrio Vulnificus ◽  
Most Probable Number ◽  
Probable Number ◽  
Low Salinity ◽  
Moderate Salinity ◽  
Salinity Increase ◽  
The Impact ◽  
Postharvest Processing

In 2009 the U.S. Food and Drug Administration (FDA) announced its intention to implement postharvest processing (PHP) methods to eliminate Vibrio vulnificus from oysters intended for the raw, half-shell market that are harvested from the Gulf of Mexico during warmer months. FDA-approved PHP methods can be expensive and may be associated with unfavorable responses from some consumers. A relatively unexplored PHP method that uses relaying to high salinity waters could be an alternative strategy, considering that high salinities appear to negatively affect the survival of V. vulnificus. During relay, however, oysters may be exposed to rapid and large salinity increases that could cause increased mortality. In this study, the effectiveness of high salinity relay to reduce V. vulnificus to <30 most probable number (MPN) per g and the impact on oyster mortality were assessed in the lower Chesapeake Bay. Two relay experiments were performed during the summer and fall of 2010. Oysters collected from three grow-out sites, a low salinity site (14 to 15 practical salinity units [psu]) and two moderate salinity sites (22 to 25 psu), were relayed directly to a high salinity site (≥30 psu) on Virginia's Eastern Shore. Oysters were assayed for V. vulnificus and Vibrio parahaemolyticus (another Vibrio species of concern) densities at time 0 prior to relay and after 7 and 14 days of relay, using the FDA MPN enrichment method combined with detection by real-time PCR. After 14 days, both V. vulnificus and V. parahaemolyticus densities were ≤0.8 MPN/g, and decreases of 2 to 3 log in V. vulnificus densities were observed. Oyster mortalities were low (≤<4%) even for oysters from the low salinity harvest site, which experienced a salinity increase of approximately 15 psu. Results, although preliminary and requiring formal validation and economic analysis, suggest that high salinity relay could be an effective PHP method.

scholarly journals Soil fertility management in apple orchard with microbial biofertilizers

2020 ◽  
Vol 222 ◽  
pp. 03020
Author(s):  
Andrei Kuzin ◽  
Alexei Solovchenko ◽  
Ludmila Stepantsova ◽  
Grigory Pugachev
Keyword(s):  
Soil Fertility ◽  
Drip Irrigation ◽  
Field Experiments ◽  
Irrigation System ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Azotobacter Chroococcum ◽  
Organic Fertilizers ◽  
High Rate ◽  
Mineral Fertilizers

Intensification of horticulture in Russia involves planting of new high-density orchards with drip irrigation and fertigation as well as intensification of the exploitation of traditional orchards. This approach involves an increase in mineral fertilizer application imposing the risk of soil fertility loss. For several reasons, the use of traditional organic fertilizers like manure in orchards is currently marginal. Although bacteria-based biofertilizers cannot substitute mineral fertilizers completely, they can significantly reduce the need for mineral fertilizer application. The effect of microbial biofertilizers of the brands “Azotovit” (Azotobacter chroococcum), “Phosphatovit” (Bacillus mucilaginosus), as well as a mixture of bacteria and the fungus, “Organic” (Azotobacter chroococcum, Bacillus subtilis, Bacillus megaterium, Trichoderma harzian) was studied in two field experiments. In the experiment #1, the preparations “Azotovit” and “Phosphatovit” were delivered through a drip irrigation system in various combinations with mineral fertilizers. In experiment #2, the preparation “Organic” was also applied to the soil with irrigation water, also in combination with the mineral fertilizer. When solely applied, none of the studied preparations changed significantly the soil nutrient content and yield as compared with the variant fertilized by the mineral fertilizer at the maximum studied application rate. The combination of the microbial biofertilizer and mineral fertilizers applied at a low rate ensured the yield commensurate to that obtained under high-rate application of the mineral fertilizer.

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